[Search for users] [Overall Top Noters] [List of all Conferences] [Download this site]

Conference netcad::hub_mgnt

Title:DEChub/HUBwatch/PROBEwatch CONFERENCE
Notice:Firmware -2, Doc -3, Power -4, HW kits -5, firm load -6&7
Moderator:NETCAD::COLELLADT
Created:Wed Nov 13 1991
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:4455
Total number of notes:16761

752.0. "Technical questions" by LISVAX::ALVES () Tue Feb 22 1994 15:55

        
        Hi,
        
        He have a big tender for one of our national telecommunication operator
        (TELECOM PORTUGAL) and there some questions to be answered. So any help 
        will be very appreciated.
        
        1) Which is the MTBF for DEChub900?
        2) Which is the MTBF for DECrepeater 900TP?
        3) Which is the MTBF for DECserver 900GM?
        4) For DECbridge 900MX:
        4.1) Which is the CPU?
        4.2) How much is the base memory?
        4.3) Which is the MTBF?
        5) For DECconcentrator 900MX:
        5.1) Which is the CPU?
        5.2) How much is the base memory?
        5.3) Which is the MTBF?
        
        Thanks in advance for your time and cooperation
        
        
        Best regards
        
        Jorge Alves
        
        PS - This tender is  a large one, at least 14 DEChub900 for feeding 30 
        Ethernets (with 1200 PC users and 400 VT users) and 80 FDDI users.
T.RTitleUserPersonal
Name		DateLines
752.1Partial answers.QUIVER::GALLAGHERThu Feb 24 1994 19:3127
Jorge,

For MTBF numbers, contact Richard Busenbark (kalvin::busenbark).
(Be prepared for a lot of numbers.  Temperature makes a difference.
Power supply MTMB has to be considered.  Blah, blah, blah,)

Contact Shou Lee (delni::s_lee) for information about DECbridge900MX
hardware.

The bridge folks are reluctant to answer questions about what processors
are used, how much memory is used, etc. because there's great potential 
to misuse the information.  Customers shouldn't be comparison shopping
based on processor type.  The most important thing for a customer to
know about the DECbridge900TM is that it screams (read: goes really,
really fast).  It forwards at about 60,000 packets per second.  If forwards
at wire-speed, which is about 60 MB per second.  It also filters at
line-rates.  (Again, contact Shou Lee or Anil Rijhsinghani (levers::anil)
for hardware questions and/or performance numbers.)

The DECconcentrator900MX folks were more forthcoming about their hardware - 
but the same warnings apply.  The processor and memory are only part of
the concentrator's hardware.  There's custom silicon, etc.  That said,
the processor is a 12.5 Mhz 68000.  There's 512KB of "flash" memory, used
as the program store.  And there's 1 MB of other memory used for variables,
buffers, landing pad, etc.

							-Shawn
752.2DEChub questionsLISVAX::ALVESTue Mar 01 1994 07:155
Hi Shawn

Thamks

Jorge Alves